Means for locking electric sockets to fixtures.



H. HUBBELL.

MEANS FOR LOCKING ELECTRIC SOCKETS T0 FIXTURES.

APPLICATION FILED SEPT. 4, 1909.

Patented Dec. 14, 1909.

- drawing forming Parana anion.

HARVEY HUBBELL, 015 BR rnonronr, CONNECTICUT.

MEANS FOR LOOKING ELECTRIC SOCKETS TO FIXTURES.- I

Specification of Application filed September 4, 1909".

To all whom it may concern:

Be it known that I, HARVEY HUBBELL, a citizen of the United States, residing at Bridgeport, county of Fairfield, State of Connecticut, have invented an improvement in Means for Locking Electric bockets to Fixtures, cation.

This invention has for its object to provide a simple and inexpensive means for simultaneously locking the cap of an electric socket to the bushing and locking the bushing to a fixture in such a manner that the loosening of a single screw will permit rotation of the cap relatively to the bushing.

It is of course well understood that it is desirable that all the parts of electric fixtures be locked together as rigidly as possible, the better to withstand vibration, and. that it is absolutely necessary that the socket be placed in such a position relative to the fixture as to .permit convenient access to the operating key of the socket. Heretofore, so far as lam aware, there has been no fixture of this character that would permit rotation of the socket cap independently of the bus'lr ing after the bushing'was secured to the fixture. In order to provide convenient means for locking electric sockets to fixtures that will permit rotation of the socket independently of the bushing and will provide means for locking the socket. at weesi'red adjustment relatively to the'b'ushing, I have devised the novel structure which I will now describe, referring to the accompanying a part of this specification and using reference characters to indicate the several parts. I p

Figure 1 is a plan view of the cap, bushing and socket; Fig. 2 a section on the line 2-2 in Fig. 1; Fig. 3 an-enlarged detail sectional view showing the members of the bushing in the locking position; and Fig. 4 is a. similar viewshowing the members of the bushing in the unlocking position.

As the shell of the socket forms no portion of the present invention I have. simply shown the cap, omitting the shell.

10 denotes the cap of a socket shell which is provideddvith a central depression 11 at the bottom of which is an inwardly-extending circular flange 12, leaving the center open to receive the bushing. The bushing comprises two members or parts, the outer member being indicated by 13 and the inner member by 14:. The outer member fits of which the following is a speeifi I tt t Patented Dec. 14, 1909.

Serial No. 516,209.

closely in depression 11, is

neck 15 and with an threaded flange 16. of the bushing is correspondingly shaped and is provided with a neck 17 lyingwithin the neck 15 but wholly out of contact thereinwardly extending inwardly extending threaded flange, indicated by 18.

'19 denotes a fixture which; is provided with a male thread adapted to engage thefemale threads of the flanges of the members with a collar lies between the outer edges of the members of the bushing. Themembers of the bushing are shown as secured together by screws 21 lying opposite to each other. One side of the members may be riveted together if preferred.

Figs. 3. and 4.. The parts are assembled by placing member 13 of the bushing in depression 11, then placing member 14 of the bushing in place, then securing the members of the bushing loosely together, that is without tightening up the screws, then turning the hub of the fixture to place in the'flanges of the bushing and then tightening up the screwswdtf'will be noted (see Fig. 4.) that before the screws are tightened up the threads upon the flanges of the gage the hub of the fixture securely but loosely and that flange 12 upon the cap lies loosely between the outer edges of the members of the bushing. In this position of the parts the socket, the cap only being shown,

operating key of the socket (not shown) in any desired position relatively to a husk or any portion of an electric fixture. When theparts are in the required position they are locked there by tightening up the screws, or the screw if but one is used and a rivet substituted for the other screw. The effect of tightening up the screw will be readily understood from Fig. 3. The members of and the flange of the cap will be locked bethreads upon flange 16 of the bushing will be forced downward upon the male threads the bushing will be forced upward against the male threads of the hub, thereby locking'the bushing rigidly to the fixture as ISEH provided with a The inner member 14:

with. Neck 17 is likewise provided with. an

of the bushing and is'preferably provided 20. Flange 12 upon the cap The operation will be understood from bushing enthe bushing will be drawn toward each other.

of the hub and the threads of flange 18 of may be rotated freely in order to place the r tween the outer edges thereof, the female well as locking the socket rigidly to the l flange and having female threaded flanges, a

male-threaded hub engaging the flanges of the bushing and means for drawing the members of the bushing toward each other, whereby the flange of the cap is clamped between the bushin members and the threaded flanges of sald members are forced against the threads 01": the hub thereby locking the cap to the bushing and the bushing to the hub.

2. Means for locking a ocket to a fixture, comprising a cap having aeentral depression and a circular flange, an outer bushing member lying in saiddepression and engaged by the flange, an inner bushing member engaging the opposite side of the flan 'e, both members of the bushing having emale threaded flanges, a male threaded hub engaging said flanges and means for drawing the ,bushing members toward each other.

8. The combination with a cap having a flange, of bushing members lying on opposite sides of said flange and themselves provided with female threaded flanges, a fixture hub having a male thread engaging said flanges and a screw passing through the bushing members and acting to draw them together. In testimony whereof I aflix my signature in presence of two witnesses.

HARVEY HUBBELL. Vitnesses:

A. M. Woosrnn, S. V. ATHERTON. 

